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Human Perception based Video Preprocessing for Telesurgery

Human Perception based Video Preprocessing for Telesurgery

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29th Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBS 2007), vol.8

作者： Jian Xu Robert J. Sclabassi Qiang Liu Luis F. Chaparro Ronald Marchessault Mingui Sun Laboratory for Computational Neuroscience Departments of Neurosurgery Bioengineering and Electrical & Computer Engineering University of Pittsburgh PA USA Telemedicine and Advanced Technology Research Center (TATRC) U.S. Army Medical Research and Materiel Command Frederick MD USA

Video transmission plays a critical role in robotic telesurgery because of the required high bandwidth and quality requirement We propose an adaptive video preprocessing technique to accelerate the transmission of telesurgical video. Using this technique, the bandwidth can be reallocated adaptively from non-essential surrounding regions to the region of interest when preprocessed image sequences are passed to the video encoder, ensuring excellent image quality of critical regions (e.g. surgical landscape). The algorithm first generates a physiologically appropriate attention map which can be updated dynamically. Then, an adaptive edge-preserving image smoothing filter is utilized to remove insignificant features. The parameters of the filter are adjusted according to the attention map. Our experimental result shows that, with the preprocessing technique, over half of the bandwidth can be reduced while there is no significant visual effect at the site of remote observer.

关键词： Humans Bandwidth Band pass filters Robots Acceleration Image sequences Image quality Surgery Smoothing methods Adaptive filters

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How to Pass Information and Deliver Energy to a Network of Implantable Devices within the Human Body

How to Pass Information and Deliver Energy to a Network of I...

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29th Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBS 2007), vol.13

作者： Mingui Sun Steven A. Hackworth Zhide Tang Gary Gilbert Sylvain Cardin Robert J. Sclabassi Laboratory for Computational Neuroscience Departments of Neurosurgery Bioengineering and Electrical & Computer Engineering University of Pittsburgh Pittsburgh PA USA Telemedicine and Advanced Technology Research Center (TATRC) U. S. Army Medical Research and Materiel Command Frederick MD USA

It has been envisioned that a body network can be built to collect data from, and transport information to, implanted miniature devices at multiple sites within the human body. Currently, two problems of utmost importance remain unsolved: 1) how to link information between a pair of implants at a distance? and 2) how to provide electric power to these implants allowing them to function and communicate? In this paper, we present new solutions to these problems by minimizing the intra-body communication distances. We show that, based on a study of human anatomy, the maximum distance from the body surface to the deepest point inside the body is approximately 15cm. This finding provides an upper bound for the lengths of communication pathways required to reach the body's interior. We also show that these pathways do not have to cross any joins within the body. In order to implement the envisioned body network, we present the design of a new device, called an energy pad. This small-size, lightweight device can easily interface with the skin to perform data communication with, and supply power to, miniature implants.

关键词： Humans Virtual colonoscopy Radio frequency Implants Coils Skin Medical diagnostic imaging Electrodes Sun Military computing

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Intraoperative needle-based refractive index measurement of Ex Vivo human breast tissue

Intraoperative needle-based refractive index measurement of ...

引用

Frontiers in Optics, FiO 2007

作者： Zysk, Adam M. Marks, Daniel L. Nguyen, Freddy T. Kotynek, Jan G. Bellafiore, Frank J. Johnson, Patricia A. Rowland, Kendrith M. Boppart, Stephen A. Department of Electrical and Computer Engineering Beckman Institute for Advanced Science and Technology University of Illinois at Urbana-Champaign 405 North Mathews Avenue Urbana IL 61801 United States Department of Chemistry Beckman Institute for Advanced Science and Technology University of Illinois at Urbana-Champaign 405 North Mathews Avenue Urbana IL 61801 United States Departments of Bioengineering and Internal Medicine Beckman Institute for Advanced Science and Technology University of Illinois at Urbana-Champaign 405 North Mathews Avenue Urbana IL 61801 United States Mills Breast Cancer Institute Carle Foundation Hospital Beckman Institute for Advanced Science and TechnologyUniversity of Illinois at Urbana-Champaign 405 North Mathews Avenue Urbana IL 61801 United States

Refractive index measurements offer high contrast between normal fatty tissue and diagnostically significant structures. We have developed a needle-based device capable of measuring internal tissue properties. We pres... 详细信息

ISBN: (纸本)1557528462

关键词： Needles

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Multimodality microscopy for structural and functional imaging of three-dimensional cell dynamics

Multimodality microscopy for structural and functional imagi...

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Organic Photonics and Electronics, OPE 2006

作者： Boppart, Stephen A. Beckman Institute for Advanced Science and Technology Departments of Electrical and Computer Engineering Bioengineering and Medicine University of Illinois at Urbana-Champaign Urbana IL 61801 United States

A multimodality microscope has been constructed to enable simultaneous optical coherence and nonlinear multi-photon microscopy. Spectroscopic detection permits three-dimensional scatterer sizing in tissue and in singl... 详细信息

ISBN: (纸本)1557528187

关键词： Coherence Functional imaging Microscopy Multiphoton microscopy Nonlinear microscopy Three dimensional imaging Medical optics and biotechnology (170.0170) Optical coherence tomography (170.4500) Three-dimensional microscopy (170.6900)

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A Model-Based Approach To Attention and Sensory Integration in Postural Control of Older Adults

A Model-Based Approach To Attention and Sensory Integration ...

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Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBC)

作者： Arash Mahboobin Patrick Loughlin Mark Redfern Department of Electrical and Computer Engineering University of Pittsburgh Pittsburgh PA USA Departments of Electrical and Computer Engineering and Bioengineering University of Pittsburgh Pittsburgh PA USA Department of Bioengineering University of Pittsburgh Pittsburgh PA USA

We conducted a dual-task experiment that involved information processing (IP) tasks concurrent with postural perturbations to explore the interaction between attention and sensory integration in postural control in young and older adults. Data were fit to a postural control model incorporating sensory integration and the influence of attention. This model hypothesizes that the cognitive processing and integration of sensory inputs for balance requires time, and that attention influences this processing time, as well as sensory selection by facilitating specific sensory channels. Differences in the time delay of the postural control model were found for age and IP task, suggesting enhanced vulnerability of balance processes in older adults to interference from interfering cognitive IP tasks

关键词： Delay effects Eyes Cities and towns USA Councils Information processing Interference Protocols Arm Cathode ray tubes Microswitches

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Advances in Contrast Enhancement for Optical Coherence Tomography

Advances in Contrast Enhancement for Optical Coherence Tomog...

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Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBC)

作者： Stephen A. Boppart Departments of Electrical and Computer Engineering Bioengineering and Medicine Beckman Institute for Advanced Science and Technology University of Illinois Urbana-Champaign Urbana IL USA

Contrast in optical coherence tomography (OCT) images is often limited, particularly when pathological tissue is morphologically or optically similar to normal tissue. In recent years, there has been increasing interest in developing methods for enhancing OCT contrast. In general, contrast can be enhanced by the administration of passive or targeted exogenous contrast agents, or by exploiting linear and nonlinear techniques for sampling the endogenous molecular composition of tissue. Many exogenous agents, in addition to being targeted to specific cells and tissues, can also serve as multifunctional agents, delivering or facilitating therapy as well as providing enhanced contrast for imaging and localization. This paper and presentation will discuss novel OCT contrast enhancing methods designed to selectively identify tissues of interest

关键词： Tomography Optical scattering Fluorescence Absorption Biomedical optical imaging Nonlinear optics Light scattering Nanoparticles Transmission electron microscopy Biomedical imaging

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Advanced Spectroscopic Coherence Tomography

Advanced Spectroscopic Coherence Tomography

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IEEE Photonics Conference (IPC)

Spectroscopic analysis of the signals generated in optical coherence tomography and microscopy can provide a wealth of additional biological information on the spatial distribution of endogenous spectral absorbers, sp... 详细信息

关键词： Spectroscopy Tomography Biomedical optical imaging Optical imaging Optical scattering Optical microscopy Face detection Bandwidth Image resolution Absorption

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Content-Based Video Preprocessing for Remote Monitoring of Neurosurgery

Content-Based Video Preprocessing for Remote Monitoring of N...

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Conference on Distributed Diagnosis and Home Healthcare D2H2 Transdisciplinary

作者： Jian Xu R.J. Sclabassi Bing Liu Mingui Sun Electrical and Computer Engineering Department University of Pittsburgh Pittsburgh PA USA Bioengineering and Electrical Engineering Departments of Neurosurgery University of Pittsburgh Pittsburgh PA USA Department of Information Security Engineering Yunnan University Kunming Yunnan China

Transmitting high-quality video via the Internet is a challenging problem in distributed diagnosis system. We propose a content-based video data preprocessing scheme, which is adaptive to the video data acquired during intraoperative monitoring and can cascade with essentially any video codec. IOM video is first decomposed into temporal wavelet subband frames and motion compensation is incorporated into these transforms to exploit inter-frame redundancy efficiently. Highpass subband frames are then adaptively weighted according to an importance map, which specifies the importance of the video contents for clinical observation. This map has higher value near the surgical site and lower value at the surrounding area. The surgical site can be located automatically by a surgical tool tracking system

关键词： Remote monitoring Neurosurgery Surgery Video compression Bandwidth Biomedical imaging Medical diagnostic imaging Layout Internet Surges

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3D multiwavelet-based motion residual compression for neurosurgical monitoring videos

3D multiwavelet-based motion residual compression for neuros...

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2005 IEEE 7th Workshop on Multimedia Signal Processing, MMSP 2005

作者： Chien, Jong-Chih Li, C.C. Sun, Mingui Department of Electrical and Computer Engineering University of Pittsburgh Pittsburgh United States Departments of Neurosurgery Electrical and Computer Engineering and Bioengineering University of Pittsburgh Pittsburgh United States

ISBN: (纸本)0780392892

Neurophysical Interoperative Monitoring (OEM) video is an important tool in biomedical applications and telemedicine and it is essential to maintain high fidelity of the frames even in low bit-rate environment. Toward this end, we studied a spatio-temporal 3D multiwavelet-based OIM video compression system that is capable of high quality output even under the demands of high compression ratios.

关键词： Wavelet analysis

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electrical and optical properties of colloidal quantum dots and quantum dot networks: Role of surface states and using biomolecular links in network assembly

Electrical and optical properties of colloidal quantum dots ...

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Nanoscale Devices, Materials, and Biological Systems: Fundamental and Applications - Proceedings of the International Symposium

作者： Stroscio, Michael A. Dutta, Mitra Ramadurai, Dinakar Shi, Peng Li, Yang Alexson, Dimitri Kohanpour, Babak Sethuraman, Akil Saini, Vikas Raichura, Amit Departments of Bioengineering University of Illinois Chicago 60607 Department of Electrical and Computer Engineering University of Illinois Chicago 60607 Department of Physics University of Illinois Chicago 60607

The objectives of this paper are to determine the role of surface states in determining the electrical and optical properties of semiconductor quantum dots in colloidal suspensions, and to use biomolecules to facilitate the chemically-directed assembly of quantum dots networks with densities approximating 1017 cm-3. Absorption spectra and photoluminescence (PL) spectra of colloidal cadmium sulfide (CdS) quantum dots are analyzed to investigate the role of surface states in determining the electrical and optical properties of these semiconductor quantum dots. In addition, this work demonstrates the utility of using glycine-glycine-glycine- cysteine (GGGC) peptides and crossing-linking chemical reactions to achieve integrated networks of ZnS-coated CdSe quantum dots and CdS quantum dots.

关键词： Semiconductor quantum dots

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